Questions from $2$&$3$ are based on the following paragraph:

A $0\mathrm{.}3mm$ thick cellophane wrapping of an area of $0\mathrm{.}2m^2$ was used for packaging. The vapour pressure inside and outside the package is $50$ and $5mmHg,$ respectively. The water vapour permeability of cellophane is $1\mathrm{.}82{10}^{-10}\frac{m^3}{s}*m^{2}at\frac{m}{m}.$

Calculate the diffusion flux $(kgmol{m}^{-2}{s}^{-1}).$

$($a$)1\mathrm{.}6{10}^{-6}$

$($b$)1\mathrm{.}6{10}^{-7}$

$($c$)1\mathrm{.}6{10}^{-8}$

$($d$)1\mathrm{.}6{10}^{-9}$

a

b

c

d

Calculate the loss of water vapour $(\frac{g}{?}$ day$)$ at steady state.

$($a$)1\mathrm{.}00$

$($b$)6\mathrm{.}26$

$($c$)0\mathrm{.}50$

$($d$)0\mathrm{.}02$